Professor of Pediatrics, Pharmacology, Pharmacy and Medical Genetics The University of Toronto; Professor of Medicine, Pediatrics and Physiology/Pharmacology and the Ivey Chair in Molecular Toxicology The University of Western Ontario

Associate Professor, Departments of Microbiology and Immunology and Medicine, McGill University; Program Director, McGill Royal College Training Program in Medical Microbiology and Infectious Diseases, Montreal

Adjunct Professor of Occupational and Environmental Health, Colorado School of Public Health, Denver, Colorado; and Adjunct Professor, Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado